Watch repair tool



Dec. 18, 1956 J. c. SHEFFIELD 2,774,265

WATCH REPAIR TOOL 7 Filed Nov. 24, 1954 2 Sheets-Sheet 1 Dec. 18, 1955 .1. c. SHEFFIELD 2,774,266

WATCH REPAIR TOOL Filed Nov. 24, 1954 2 Sheets-Sheet 2 z: \i I /2 26 64 4 l i]; V W l 20 60 2 la/m 6. Sheffield IN VENTOR.

United States Patent WATCH REPAIR TOOL John C. Shefiield, Shreveport, La.

Application November 24, 1954, Serial N 0. 470,932

1 Claims. (31. 81-6) This invention relates to a watch repair tool and more particularly to a Watch or clock balance cock assembly tool.

It is an important object of the invention to provide a watch or clock balance cock assembly tool which insures rapid assembly of the component parts of the balance. cock without smearing the oil on the balance cock jewels. V

A further important object of the invention is the provision of a balance cock assembly tool with aligning means on which the balance cock components are rapidly assembled in correct relationship and are held in such relationship until fastened together.

Another object of the invention is the provision of a balance cock assembly tool in which the aligning means are adjustable to accommodate a wide range of watch and clock balance cocks.

Yet another object of the invention is the provision of a balance cockassembly tool of simple and durable construction which isefiicient in operation and use.

These together with other objects and advantages which will become subsequently apparent reside in the details of construction and operation as more fully hereinafter described and claimed, reference being'had to the accompanying drawings forming a part hereof, wherein like numerals refer to like parts throughout and in which:

Figure l is a perspective view of'the assembly tool; .Figure 2 is a sectional view taken along the line 22 of Figure 1;

Figure 3 is a sectional view taken along the line 33 of Figure 1;

Figure 4 is an enlarged fragmentary view of the end portion of the adjusting rod shown in Figure 2;

Figure 5 is an enlarged exploded perspective view of the watch to be assembled; and

Figure 6 is an enlarged fragmentary sectional view similar to Figure 2 and shows the tool in operation.

The assembly tool, which is generally designated by the reference numeral 10, includes a base member 12. Protruding from the upper surface of the base member is a pair of aligning pins 14 and 16 on which the balance cock components are positioned for assembly. To facilitate such assembly, the pin 14 is arranged to be vertically retractable into the base member and the pin 16 is arranged for movement toward and away from the pin 14.

The means for retracting the pin 14 comprise a plunger 13 arranged in a vertical bore 20 in the base member. The upper end of the bore 20 communicates with a bore 22 of reduced diameter which extends to the upper surface of the base member. The pin 14 extends through the bore 22 and is mounted in an axial aperture 24 in the upper end of the plunger 18, being clamped in place by the screw 26 which is threaded into a recessed portion at the upper end of the plunger.

The plunger 18 is provided with a recess 28 in its central portion having V-shaped side walls. A transverse slot 36 extends upwardly from the bottom of the base member in intersecting relationship to the vertical bore 20.

A plunger operating lever 32 is mounted for pivotal movement in the slot, as by means of a pivot pin 34 extending through the slot adjacent one side of the block and passing through an aperture at the end of the lever. A central portion of the lever extends through the plunger recess 28 and engages the V-shaped side walls of the recess to move the plunger 18 and aligning pin 14 upwardly or downwardly in the base member. The end of the lever 32 remote from the pivot point is provided with an enlarged handle portion 36 and a stop pin 38 is mounted in the slot to limit the downward movement of the handle and the lever. Any suitable means may be provided for retaining the lever and plunger in their uppermost position with a pin 14 projecting from the upper surface of the block.

The means for moving the pin 16 comprise an adjusting rod 40 arranged in a horizontal bore 42 adjacent the upper surface of the base member. The bore 42 extends from one end of the base member to a point adjacent the reduced vertical bore 22. An elongated recess 44 is provided in the upper surface of the base member communicating with the upper portion of the inner end of the bore 42 and the upper end of vertical bore 22.

The aligning pin 16 is mounted on the inner end of the adjusting rod 46 and extends upwardly through the recess 44. The mounting means, as best seen in Figure 4, include a bent leg portion 46 on the pin 16 which extends into an axial aperture 48 in the adjusting rod. A slot 49 is provided in the end of the rod for supporting the upright portion of pin 16 against rotation and a screw 50 is mounted in a recessed portion of the rod to clamp the bent leg 46 in the aperture 48.

A sleeve member 52 is threaded into the end of the horizontal-bore 42 and a reduced portion 54 of the adjusting rod passes through the sleeve member. A coil spring 56 is positioned between the threaded sleeve member and the shoulder on the adjusting rod and urges the adjusting rod inwardly in the bore. 7 The outer .end of the reduced portion 54 is externally threaded to receive an internally threaded adjusting knob 58 which abuts the outer end of the sleeve. It will thus be readilyrapparent that rotation of the adjusting knob causes a corresponding inward or outward movement of the adjusting rod and pin 16. To prevent rotation of the adjusting rod in bore 42, a set screw 60 is threaded into a second vertical bore 62 extending through the base member and intersecting the base member may be made of sutficient width to provide access to the screw 50, a cover plate 66 may be advantageously provided for the upper surface of the base member. The cover plate is provided with a narrow slot 68 closely accommodating the aligning pins 14 and 16, thereby providing a maximum working surface adjacent these pins. The cover plate is secured to the base member by appropriate fasteners 70 and is preferably made of a non-magnetic and rust-proof material. Q

The method of assembling the component parts of the balance cock by means of this tool will now be described.

The pin 14 is raised to a position protruding from the upper surface of the cover plate by upward movement of the handle 36. The knob 53 is then rotatedto space the pin 16 from the pin 14 at a distance corresponding to the distance between the two threaded screw holes 72 and 74 on either side of the upper balance jewel setting 76. The cleaned balance jewel setting is then positioned, bearing surface up, on the block with the pins extending through the threaded screw holes. A small drop of oil is then placed on the center of the cap jewel and the regu- Patented Dec. 18, 1956 ate 92 n it a r at un h nce i w setting. r

The balance cock plate 80 carrying the balance hole iewel ndr-hay tts se d ew. an r tes rre po di to threaded serew holes in the-balance jewefsetting isthenyos ioned'on the cover plate with thepins extending through the screw apertures 82 and 84 and lowered in correctly aligned relationship with the balancejewel'setting. Prior to this operatiornja small drop of'oil may he placed on the hole. jewel in thecock plate, if desired! itiwillbe seen that the above described steps insure proper alignment between the balancejewel andthe hole jewel as, the balance Ycoclt plate is lowered into con tact withthebalance jewelsetting, thereby insuring'the proper formation of the oil meniscus between thebalance andhole jewels without any. possibility of lateral movement -offthese parts whichwould smear the oil,

' In 'the neXt operation, a pointed stick of jewelerspeg wood or other suitable tool is held on the surface of the balance cock plate 80 adjacent the pin 147cc maintain theplate in. positionron the jewel setting and the pin 14 Y I is-retracted below the surface of the base memberby said adjusting rod being provided with aligning'pins extending through a recess in the uppersurfac'e of said base.

in spaced, parallel relationship, a pivoted lever member engaging a notched portion of the plunger for retracting the plunger pin, and a knob member threaded on the outer end of the adjusting rodfor moving the adjusting rod pin 'toward and away from the plunger pin;

2 The structure as set forth in claim 1, further in-x cluding a slotted cover platefor the upper surfaceof said base, said cover plate being non-magnetic and rust-proof.

J. watchmakers" assembly.toolcornprising''a'base member including a horizo'nt'alfuppensurface, a'pairof Q spaced, parallel pins extendingifrom the upper surface of said base memberfor' supportingztime piececomr' ponents in aligned relationship, horizontally. reciprocable' adjusting means slidablysupported. in the base member, 1 said horizontally reciprocable adjusting means beingconetednne ofsaid P u in s pPQr ng e 0n fo mo ping the. on'e'pintowardj'and awayir'om the othenofifthe downwardrnovement of the lever handle 36. 'An appropriate jewel screw 86 is then positioned in the aligned V 1 screw apertures of both the jewel setting and balance cock 7 plate formerly occupied by. the pin 14 and securely tightened to fasten the balancecock parts in' aligned position, thepin 16. serving to prevent pivotal movement of the parts during'this tightening operation. The assembled balance cock may then be lifted from the pin 16 and positioned. on another portion of the cover plate fi fi for insertion andtightening of a'second'jewel screw 86.

'Frornthe foregoing, the construction and operation of pended claims. 7 a 7 What is claimed as new. is as follows:

1. A. Watchmakers assembly tool comprisinga' base, a v

' plunger mounted .for vertical movement in said base, an

adjustingxodmounted .for horizontal movement in'said base,i-the upper end of the plunger and the inner end. of

pins, and vertically reciproeable adjusting meanstslidably 1 i supported in the base'member saidvertically reciprocable adjusting means being connected. to the other pin in, supporting relation for retracting the other pinbelowthe uppersur face ofthe base member, w 7

. 1 '4. A watchmakers assembly tooLas set'forth in claim 3 wherein the horizontally reciprocable adjusting means comprises an adjusting. rod horizontally slidable in the baseiniembergadjacent the upper surface there0f,'and a manipulating member secured on an end portion of said a rod extending out of the base member for actuating' saidf rod.

cludes a plunger member vertically and slidably supported in thexbasc, membenand lever means ,operatively connected; to, said .plungermember for raising and lowering said plunger. member relative-to theupper surface of said base member. w

I 'ReferencesCited in the fi1e. ofthislpatent V .UNITED STATES'PATENTS '5. A watchmakefis'as'sembly tool as set forth in wherein the vertically reciprocable adjusting means in- 52,564,650" Sinkler l f lAu i4,' 1951-. 7' 7 F REIGN PVA'TENTVS 829,127; Germany; r i Jan. v24, 1952 i 

